Fan



Jan. s, 1924. v A l E. F COLBY.

'FAN l Filed oct, s1. 1922 2 shams-Shenr 1 gllllllllzm WIr/M8858 vehicles. combustion engines of motor vehicles carry` i a pulley upon which there 1s Ymounted fan 'Patented 53, ili.

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Application filed october 31, 1922,. Serial No. 598,14.

rthe fan of theA present structurevis particularly adapted to be employed for cooling internal combustion engines on motor As is well known most internal blades and which are used for circulating air about the internal combustion engine. An obj-ect of this invention isfto provide an extremely simple and efficient casting by` which fan blades may be securely mounted upon a pulley of the character referred to. i lt is also an important object of the invention that means be associated with the casting and blades whereby to permit the lblades to be adjustably rotated upon their ,f longitudinal axis and thereby to change the direction of current of air propelled thereby. The purpose of changing'the current of air propelled by the fan blades as well lrnown is to either cause tlie'fanto cool the engine "or to utilize the heat radiating from the eny j gine for heating the radiator forward theref against turning movement about @ther objects relating Kto details of construction will hereinafter appear.

The invention is illustrated by way of example in the accompanying drawings, in

which Figure 1 is a view in front elevation ofa fan mounted in accordance with thel present invention. v.

Figure 2 is a top plan view of the same.

i lEigure 3 is a. detailed inner plan view of a fan blade supporting nipple formed upon the casting of the present invention and illustrating the manner. in which the fan blade may be turned about its longitudinal axis.

Figure L1-'is a detailed end view of the fan blade employed.

lli re 5 is a vertical sectional view further illustrating the construction of the fan blade supporting the casting and the manner in which the blades are adjustably held ltheir longif. tudinal axis. l

Figure 6 is a ing, and

lFigure 7' is a similar view showing the manner in which the coil springs for holding the fan blades in their adjusted position are connected to each other.

perspective view of the cast- 'Like reference numerals refer to like parts,

throughout the drawings. v

Referring to the drawings more particu` larly, P indicates generally a pulley which is usually in the form of a casting and having a central opening through which a supporting shaft therefor is extended and secured. Over this pulley there passesktlie usual fan belt indicated at B whereby to rotate the pulley.

ln' carrying out the present invention there is provided a casting generally indicated by the reference numeral C, said castlti ing consisting in a circular plate 10 having a circular depression 11 occurring centrally thereof and upon one face and also having formed uponl this face a plurality of radially extending nipples 12. The nipples 12 correspond. to the number of fan blades to be supported and in thisA instance there its shown four `nipples-and arranged at equal spaced relation witheachother. rlhe nipples terminate at theirA outer ends in a slight protrusion 13 and at their inner ends in an enlargement 14, said enlargement occurring upon'the outer periphery thereof as A shown, and the inner ends of said nipples alsol terminating with the circular depression 11- as shown.` Between each pair of adjacent nipples there is formed a reinforcing rib 15, said ribv occurring adjacent the peripheral edge of the casting.

t A plurality of fan blades are provided,- each blade being generally indicated by the reference character F, and each blade' preferably comprises a body portion 16 which is of sheet metal and stamped to form at its inner end a tubula'r extension 17 to serve as a stem therefor. This stem is adapted to be` received by either of the nipples 13 and freely-rotate therein.

The inner end of each nipple 12 is rovided with a plurality of notches exten in radially thereof, said notches being arrange in pairs as at 18 and 19, Figure 6, and said pairs being so arranged that one notch occurs diametrically opposite of the other. Each fan blade lF carries at the free end of its stein 17 a pin 20, said pin being disposed transversely of the longitudinal axis of the ica ing a'stem journaled forV turnin movement by sald Supporting member an said stems extending radially from a common point,

' Y a plurality of interconnected coil springs disposed within the circumference described by the inner ends of the fan blades, each of lsaid fan blade lstems being 4engaged by an` end of one ofsaid coil springs whereby to press the fan blade outwardly, and means cooperating withsaid coil springs for ad justably'holding the fan blades against turning movement about their longitudinal axis.

v ,8. In combination, a plate-like casting, cirfcular in formation, and having formed upon '15 its onel face a plurality of radially disposed nipples, a plurality of fan blades one vfor each of said nipples, said nipples being whereby to adjustably hold the fanv against turning movement about their longitudinal axis.

9. ln combination, a circular plate-like casting, having four nipples formed. upon none face thereof, said nipples being equally spaced circumferentially, a plurality of fan blades, one for each of said nipples and each fan blade having a stem' adapted to be journaled'by the associated nipple and also carrying at its inner end a transversely disposed pin, the-ends of which extend and adapted to be disposed in notches formed 4 upon the inner end of the-nipples, a pair of interconnected coil springs disposed within the circumference described by the inner ends of said nipples, and each fan r blade stem abutted by an end of one of said o coil springs whereby the cross pins are retained in their notches to adjustably hold the fan blades against turning movement about the longitudinal axis thereof. 10. In combination, a plurality of members, arranged in circular formation and the inner ends thereof in spaced relation with a common point, said members being adapted for free inward movement,and means for yieldingly pressing said members outwardly,

said means comprising a pair of coil springs interconnectedto'provide a plurality of coil springs `extending from a common point and the free end of each spring adapted yto engage' with the inner end of a member.

11. A device of the character described, comprising a supporting member, a pluralityof stem journals arranged thereon and about a common point, afan bladevstem supported by each journal, a plurality of coil springs, one for each pair of fan ,blade stems and each coil spring having a plurality of central convolutions threaded through similar convolutions of another coil spring whereby said coil springs are connected with each other, Vand the ends of each coil spring adapted to engage the associated ends `of a pair of'fan blade stems for pressing the same outwardly, and means for limiting the outward movement of said fan blade stems.

12. A device of the character described,

lcomprising a supporting head, a plurality ofsleeve journals or nipples arranged upon said head in circular formation and about a common point, a plurality of fan blades, one for each sleeve journal, and each fan blade having a hollow stem adapted to be l received by said sleeve journal, a plurality of interconnected coil springs, one for each pair of fan blades, said coil springsbeing arranged so that their central portions are connected to each other and the ends thereof 'extending into the stemsy of saidv fan blades, and means extending transversely of each fan blade stem adapted to serve as a stop for the one end of associated coil spring and also to serve to limit the outward movement of said fan'blade stem.

13. A device of -the charactei-sdescribed, comprising a supporting head, a pair of journal sleeves carried by said head and arranged in axial alignment With each other and their opposing ends in spaced relation,

a hollow stem journaled in each journal sleeve, a pin extending transversely through the inner end of said stem and adapted to limit the outward movement thereof, and a coil spring having its ends, disposed within the inner endsoflsaid hollow stems and each end engaging the associated cross pin and thereby to urgethe stems outwardly.

VELI FRANKLIN ooLBY'. 

